Door-operating engine.



I F. D. WARD. DOOR OPERATING ENGINE. PPLICATION FILED FEB. 27. 1911.

FRANK D. wenn, or NEW YORK, u. Y.

DOOR-OPERATING ENGINE.

Specification of Letters Patent.

Application sied February 27, 1917. lserial No. 151,291.

To aZZ 'whom t may concern:

Be it known that I, FRANK D. WARD, a citizen of the United States, and aresident of the borough of Manhattan, city andState of New York, have invented certain new and useful Improvements in Door-Operating Engines7 of which the following 'is a description in such full, clear, and eXact terins as will enable any person skilled in the art to which it pertains tomake and use the same.

My invention relates to a deviceiiitended especially, though not necessarily, for 0perating the doors of street railway cars. The device, however, is useful in various other connections as will be apparent to skilled mechanics.

The object of the invention is to provide an effective and practicable compressed air or other fluid motor under electrical control and provided with motion transmitting devices adapting it especially to be used for operating the doors and interlock7 of socalled payasyouenter street railway cars or other analogous apparatus.

To this end the invention consists in certain novel features of construction-and coinbinations 0f parts which will be fully set forth hereinafter and particularly pointed out in the claims.

Reference is had to the accompanying drawings which represent-as an example, the preferred embodiment of my invention.

In these drawingsl Figure 1 is a longitudinal section ofthe device. Y

Fig. 2 is a similar section except that the valve devices are shown in elevation and the piston of the motor or engine is illustrated in the position opposite to that shown in Fig. 1,',and p Fig. 3 is a cross section on the line p-S y of Fig. e;

5 indicates the cylinder of the engine or motor and 6 and 7 indicate the heads thereof. The cylinder 5 is preferably formed of Wrought or drawn seamless metal and the heads 6 and 7 are cast in suitable form.. f

Operating in the cylinder 5 are pistons 8` and 9 of the usual or any desired construction rigidly connected by a rod The piston 8 has a lug 11 thereon to which a rebent orsubstantially U-shaped arm or elbow 12 is pivoted at one end. The other-end portion of this arm 12 plays freely throughinder 5 and is pivoted to a thrust rod 15 located outside of the cylinder, the pivot operating in parallel guides 1G fastened to and extending along the cylinder as shown in the drawings.

The motive fluid acts on the outer faces of the pistons 8 and 9, the space between the pistons being exposed to atmospheric prese sure through the slot 14. This allows the lbOWialvm 12 to slide freely with the pistons and outing to the form of the aiin and the arrangement of the guides 1G the arm has a certain Swinging motion on its pivot sirnuln taneously with its sliding motion and thereby the arm is caused to impart to the rod 15 port 38. Within the housingO isa slideA valve 21 which alternately opens the pressure supply passages or ports 22 and 23 to the source of pressure which enters the housing 30 through a supply pipe 32 (see dotted lines in Fig. 1).` Vhen one of the supply ports is opened to the pressure the other ort is connected with the exhaust 33 accor ing to the usual slide valve practice and by thev regular operation of the valve 21 pressure is alterna-tel admitted to and exhausted. from the en s of thecylinder 5 causing reciprocation of the pistons 8 and 9 therein.

Air tight housings 17 and 18 are joined to the valve housing 30 at opposite sides thereof and contain solenoid magnets with which the armatures 19 and 2O respectively operate. Thesearmatures are connected by brass or other non-magnetic rod 31 which engages the slide valve 21so that ieciprocation of the solenoid armatures 19 and 20 causes the slide valve 21 to take its characteristic back and forth motion and thereby control` the pressure vto the cylinder 5.

Patented Mar. 26, 1Std ref ln order` thus to operate the slide valve it is necessary, according to the Wellknovvn practice, to alternately energize the solenoid magnets. This may be doneby la switch or control device of any desired kind (not shown).

' joined to a wooden or othernon-conducting rod 29. Said rod has a slot 28 in its end opposit-e the switch 24 which receives a pin connection on the end of a rocking lever 26. The lever 26 is fulcrumed at 27 and its inner end engages a leaf spring 30 by 'which spring the lever is releasably held in either one 0f its extreme positions. The outer end of the lever 26 is forked and adapted to be engaged by a'pin 25" on the thrust rod 15 'whereby the lever is rocked back and forth making or breaking the circuit ot the switch 24 as the rod 15 reciprocates.

It should be noted that the metal casings 17 and 18 of the solenoid magnets are hermetically joined to the valve housing 30 and that there is no communication between the interior of these parts and the atmosphere. Hence the armatures 19 and 20.1iave a sort of dash pot'action in the solenoids which cushions the stroke ot' the valve 21 and a1'- matures19 and 20 and renders the operation of the valve regular and noiselcss.

In the operation of the device alternate energization of the solenoids will result in reciprocation of the valve 21 and the alternate admission of pressure to and exhaust of pressure from the ends ot the cylinder This givesthe pistons 8 and 9 and their connected parts 12 and 15 corresponding reciprocation and by the coaction ot the parts 25, 26 and 29 theV switch 24 is simultaneously operated -to make-and break the circuit to which it relates. The arm 15 may be oonnected to operate any desired device and the switch 24 may be connected to control an electric circuit having relation to the device operated by the arm 15.

Assuming, however, that the invention is applied to the operation of the usual sliding or swinging doors of the so-called pay-asyou-enter street railways cars (to which indeed it is especially adapted); then the circuit of the solenoids 17 and 18 is placed under the control of the conductor ofthe car (by the usual or any known form of switch device not shown) the arm 15 is me chanically articulated to the car doors `to give them their necessary sliding or other motion, to open or close; and the circuit of the switch 24 is made to control the usual interlocking device of modern electric street railway cars by which device the motorinan is prevented .trom starting the car until the doors are shut by the conductor. This intei-locking7 device is well-known'in.electric street railway practice; it forms no part ot niy invention and'is not here-shown.

' lVhcn the invention is so connected and arranged, the car conductor controls the circuits of the solenoids to actuate the valve 2l and through it to bring about reciprocation of the parts 8, 9, 10, 12 and 15 to open and close the doors of the car, and the switch 24 controls the interlock circuit so that the car cannot be started until the doors are closed, all of which connections will be understood by persons skilled in the art.

What I claim is: v

1. A motor having a cylinder with anl intermediate opening, two rigidly' connected pistons, an elbow arm one endf'of Whichis articulated to the pistons andthe other end of which strokes through the opening in the cylinder and a device` operated by said elbow arm.

2. A motor having a cylinder, connected pistons operating in the cylinder, the cylinder having an opening in its side, and a return bent or U-shaped arm, one end thereof lying4 longitudinally in the cylinder and articulated tothe pistons and the other end thereof adapted to stroke in and out of the cylinder through said opening in its side.

3. A motor having a cylinder With an inter-mediate opening in its side, connected pistons in the cylinder on opposite sides ot `the opening and a return bent or U-shaped arm one part thereof extending longitudinally in the cylinder between the pistons and articulated thereto4 and the other part thereof adapted to stroke in and out of the cylin` der through" said opening therein.

4. A motor having a cylinder, connected i pistons operating inthe cylinder, the cylinder having an opening in its side, and a. return bent or U-shaped arm, one end thereof lying longitudinally in the cylinder and articulated to the pistons and the other end thereof adapted to stroke in and out of the cylinder through said opening in its side, and means outside of the cylinder for laterally guiding said arm.

5. A motor having a cylinder with an intermediate opening in its side, connected pistons in the cylinder on opposite sides of the opening and a return bent or U-shaped arm one 'part thereof extending longitudinally in the cylinder between. the pistons and articulated thereto and the other part thereof adapted to stroke in and out ot' the cylinder through said opening therein, and means outside of the cylinder i'or laterally guiding the said arm.

6. A motor having a cylinder, connected pistons operating therein, a return bent or U-shapedarm, one end of which is articulongitudinally in the cylinder, the other end of said arm adapted to stroke in and out of the cylinder through an opening therein, in direction longitudinal of the cylinder, a thrust rod connected to the second part of said arni and an electric switching device operated from said thrust arm.

A motor having a cylinder with an intermediate opening, pistons operating in the cylinder and at opposite ends of the opening, means connecting the pistons together, a return bent or U-shaped arm, one part of which moves longitudinally in the cylinder 4and is located between the pistons and articulated thereto and the other rm of which i strokes 1n and out of the cylinder through said opening in the side thereof.

9. Ap motor colnprisinga cylinder with an intermediate opi-ning, connected pistons operating in the cylinder at opposite ends ot the opening, a return bent or U-shaped arln articulated to the pistons at its inner part, said inner part inoving longitudinally inthe cylinder and between the pistons and the other part of tlie'arni stroking in and out of the cylinder thlaugh theopening therein,

- part, said inner part moving longitudinally in the cylinder and between the pistons and the other part of tlvA arm stroking in and out of the cylinder through the opening therein, a thrust rod pivoted to the second nanied part of the arm and means outside of the cylinder for laterally guiding the arm and thrust ,rod and an'electric switch operated by said thrust rod.

In testimony whereof I have hereunto signed my name in the presence of two witnesses.

FRANK D. WARD.

' Vitnesses:

C. A. TIGHE, lV. A. COCKLEY.

Co'pien of this patent may be obtained for ve cents each, by addressing the l Commissioner of Patents. Washington, D. C. 

